package com.ydm.utils;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTCreator;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Calendar;
import java.util.Map;

public class JWTUtil {
    private static final String SING = "!q@w34rertvs!";

    /**
     *  生成token
     */
    public static String getToken(Map<String,String> map){
        Calendar instance = Calendar.getInstance();
        instance.add(Calendar.DATE,7);//默认7天失效

        //创建jwt builder
        final JWTCreator.Builder builder = JWT.create();

        //payload
        map.forEach((k,v) -> {
            builder.withClaim(k,v);
        });

        String token = builder.withExpiresAt(instance.getTime()) //指定令牌过期时间
                .sign(Algorithm.HMAC256(SING));

        return token;
    }

    /**
     * 验证token
     *
     * @return
     */
    public static DecodedJWT verifyToken(String token){
        DecodedJWT verify = JWT.require(Algorithm.HMAC256(SING)).build().verify(token);
        return verify;
    }

    /**
     * 获取token信息
     */
    public static DecodedJWT getTokenInfo(String token){
        DecodedJWT verify = JWT.require(Algorithm.HMAC256(SING)).build().verify(token);
        return verify;
    }
}
